Heating and ventilating apparatus



April 18, 1933. M PAYNE HEATING AND VENTILATING APPARATUS Filed Dec. 50, 1931 4 Sheets-Sheet l R o T N m I Matt Payne ATTOR LY April 18, 1933. MPAYNE 1,903,939

HEATING AND VENTILATING APPARATUS I Filed 'Dec. 50, 1931 4 Sheets-Sheet 2 HHIHH 9. E

i ii INVENTOR Matt Payne ATTORNEY HEATING AND VENTILATING APPARATUS Filed Dec.

4 Sheets-Sheet 3 INVENTOR Matt Payne ATTORNEY April 18, 1933. M. PAYNE HEATING AND \IENTILATING APPARATUS 4 Sheets-Sheet 4 Filed Dec. 30, 1931 ATTORNEY Patenteel Apr. it 1933' LQF FFF l 01E S'URBITON, ENGLAND HEATING AND VENTILATING .AIPPTUS Application filed. December 80, 1931; Serial No. 583,990, and. in Great Britain January 26, 1931.

This invention relates to heating or heating and ventilating apparatus of the kind in which a radiator or other heating element is associated with a fan or blower so ar- 5 ranged as to induce a forced circulation of heated air in a room or other enclosure by blowing air through or over the radiator or heating apparatus.

The object of the invention is to provide a new or improved heating or heating and ventilating apparatus more particularly but not exclusively intended. for use in vehicle bodies and designed to provide a uniform distribution of heat within the interior of the vehicle body or other room or enclosure in such a manner as to obtain an adequate standard of comfort for each occupant.

In its application to vehicle heating the invention comprises a radiator or heating element and a fan or blower disposed on the underside of the roof or on one of thewalls of the vehicle at an approximately central point and so arranged that air is sucked from the central region of the body space, heated and then blown outwards in all directions so as to sweep over the inner surface of the roof and walls of the body thereby maintaining these surfaces at an elevated temperature as well as warming the air throughout the 0 interior of the body.,

In the preferred construction of heating apparatus, whether intended for use in a vehicle or in a building, the fan or blower is arranged to suck air from the room or other enclosure in an axial direction and to blow it radially outwards over the surface of a heating element or elements arranged around the fan or blower.

Alternatively the fan may be constructed to move the air in the reverse direction, that is to say, to suck air radially inwards over the surface of the heating element or elements which are arranged round the fan or blower and to deliver the heated air in an axial direction.

Several examples or vehicle heaters constructed in accordance with the invention are illhustfiated in the accompanying drawings in w 10 Figure 1 is a side elevation, partly in section, showing a heater adapted to be fitted to the front wall of the vehicle body.

Figure 2 is a front elevation of the heater shown in Figure 1.'

Figure 3 is a view similar-to Figure 1 showing a modified construction.

Figure 4 is an elevation, partly in section, showing a heater adapted to be fitted to the roof of a motor vehicle and,

Figure 5 is a view similar to Figure 4 showing a modified form of heater in which the blower is driven by a wind wheel mounted on a shaft projecting above the roof of the 1 vehicle.

As shown in Figures 1 and 2 of the drawings the heater comprises a circular base plate 1 adapted to be secure-dby screws or otherwise to the front wall of the vehicle body and an annular cover plate '2 secured to the base plate by bolts 3 which hold the cover plate in a position parallel to the base plate and spaced therefrom. The cover plate is provided with a central hollow boss or sleeve 4 connected to its inner circular edge by radial ribs 5 so as to leave between the central boss and the circular inner edge of the cover plate a substantially annular opening through which air can be sucked into the space between the base plate and cover plate.

The central boss 4 carries an electric motor 6 driving a fan 7 which is carried on the armature shaft of the motor and is located between the plates 1 and 2, the blades of the fan being bent at an angle of approximately 45 to the armature shaft so that they extend obliquely across the space between the plates 1 and 2.

A number of semi-circular coils of wire wound tubing 8 or other suitable heat radi ating tube are mounted between the plates, 1 and 2 near their outer edges so as to surround the fan 7, and are connected to a pair of header tubes 9 which project through the base plate 1 and are adapted for connection to suitable pipe conduits by which hot water or other heating fluid is conveyed to and from the heater through the wall of the vehicle so as to circulate through the coils of tub-' ing 8 A screen or filter 10, formed of wire netting or other suitable material, is fitted to the annular opening in the cover plate 2 and a similar screen 11 is mounted between the outer edges of the plates 1 and 2 so as to surround the tubing 8.

Figure 3 of the drawings shows a modified form of the invention in which the central boss 4 and radial ribs 5 of the cover plate are omitted and in which the electric motor 6 is mounted in a central hollow boss or sleeve 12 formed in the base plate 1. In this 2 construction, the fan 7 carried on the armature shaft of the motor 6 is disposed approximately in the same plane as the cover plate 2 so as to drive air in a substantially axial direction through the central annular opening in the cover plate and the base plate 1 is formed with a curved surface of rotation 13 arranged to deflect the air stream radially outwards within the space between the plates 1 and 2, so as to cause air to be blown radially outwards over the heat radiating surfaces disposed between the plates 1 and 2, at the outer edges thereof. The construction of the heater shown in Figure 3 is generally similar to that shown in Figures 1 and 2 and the same reference numerals have been applied to corresponding parts on the drawin s.

Figure 4 of the accompanying drawings shows a modification of the invention which is similar to those shown in Figures 1 to 3, but in which the electric motor is disposed outside the space between theplates 1 and 2 and drives a blower of the centrifugal impeller type. The heater shown in Figure 4 is intended to be applied to the roof of a vehicle body by securing the plate 1 to the inner surface of the roof, the motor 6 being accommodated in a recess in the roof.

The blower shown in Figure 4 takes the form of a centrifugal impeller composed of two parallel plates or discs 14 connected together towards their peripheries by vanes or impeller surfaces 15, the lower disc 14 having a large central opening through which air is induced by the action of the vanes or impeller surfaces.

A number of coils of wire wound tubing or other heat radiating tubing are supported between plates 1 and 2 near the outer edges thereof as in the constructions previously described. As shown in Figure 4however, these coils are formed from a single length of tubing 16 whose two ends pass through openings in a plate 16a. supported between the plates 1 and 2, and which are suitably adapted for connection to pipe conduits by which the water or other heating fluid is conveyed to and from the tubing.

Figure 5 of the drawings shows a construction in which the blower is driven by a wind wheel mounted on a shaft projecting above the roof of the vehicle. As shown in this figure, the construction of the heater is similar to that shown in Figure 4 but the plate 1 is formed with a sleeve 17 which projects upwardly through the roof of the vehicle, and is located at its upper end in an openin 18 formed in a circular plate 19 which is to the outer surface of the roof.

The blower is carried on a shaft 20 which is supported in bearings in the sleeve 17 and which is driven by'a wind wheel 21 carried on the upper end of the shaft 20, this motor wheel being of any known type capable of being driven by the current of air due to motion of the vehicle.

A cover plate 22 is supported above the wind wheel by posts 23 attached to the plate 19 so as to protect the upper surface of the wind wheel.

In each of the modifications described, when the impeller or fan is in action, air drawn in through the central opening in the cover plate 2 is heated by the radiating surface 8 or 16 and ejected radially outwards in all directions so as to sweep over the surfaces of the roof and walls of the vehicle body, thereby maintaining these surfaces at an elevated temperature as well as warming the air throughout the interior of the body. The tubing 8 or 16 is preferably supplied with hot water from the engine cooling system of the vehicle.

It is to be understood however, that the direction of flow of the air stream can be reversed if necessary to meet particular requirements so as to cause air to be drawn in through the space between the peripheral edges of the plates 1 and 2 and blown out through the central opening in the plate 2.

A thermostat control of the temperature xed within the vehicle may be obtained by apparatus adapted to control the temperature of the water or other heating fluid supplied to I the heat radiating surfaces. Alternatively, a thermostat of the air-temperature type may be arranged to control the supply circuit for the fan or impeller driving motor, stop the fan or impeller automatically when the temperature rises above a pre-determined limit, thereby controlling the rate of transfer of heat from the heat radiating surfaces to the vehicle body and its contents. Further, electrical resistance heating elements may be substituted for the tubing 8 and 16 the supply of current to the said heating elements eing controlled by a thermostatic switch if required.

In any of the constructions shown in Figures 1, 2, 4, or 5 of the accom anying drawings, the fan or blower may e utilized for the purpose of ventilation by providing a controllable fresh air inlet communicating with the suction side of a fan or blower through an opening in the base plate, so that a quantity of fresh air is drawn into the space between the plates 1 and 2, and mixed with the air which isdrawn into the space so as to from the interior of the vehicle body so that the device acts both as a heater and a ventilator.

I claim:

1. An air heater comprising an annular heating element adapted throughout its entire circumference for the circulation of air radially therethrough, a fan or blower adapted to draw air from a point remote from the heating element and-force it past the heating element, and a heat radiating member arranged in close relation to the heating element and extending radially in all directions beyond the heating element to cause the heated air passing through the heating element to fiow in all directions over the surface thereof.

2. A heater comprising a pair of parallel frame plates arranged to form a flat cylindrical chamber, a central opening in one of said frame plates, a fan disposed in said central opening and carried by a driving motor fitted to the other frame plate and an annular heating element or elements arranged between the frame platesnear the peripheral edges thereof, the frame plate carrying the fan driving motor being shaped to form a deflecting surface whereby air drawn in to the space between the frame plates by the fan is deflected radially outwards in all directions so as to pass over the surfaces of the heating element or elements and out through the space between the peripheral edges of the frame plates.

3. An air heater comprising a pair of parallel frame plates arranged to form a flat cylindrical chamber, a sleeve carried by one of the frame plates, a fan disposed within said chamber, a driving motor for the fan mounted in the sleeve, the frame plate which carries the sleeve having an annular air inlet opening surrounding the motor, and annular heating means disposed between said frame plates around said fan.

4. An air heater comprising a pair of parallel frame plates arrangedto form a flat cylindrical chamber, a sleeve carried by one of the frame plates, one of the frame plates being provided with an air inlet opening, a fan in the chamber, a motor carrying the fan and mounted in the sleeve, and an annular heating element arranged in the chamber around the fan.

5. An air heater comprising a pair of parallel frame'plates arranged to form a flat cylindrical chamber, a sleeve carried by one of the frame plates and located between the planes of the frame plates, one of the frame plates being provided with an air inlet opening, a fan in the chamber, a motor carrying the fan and mounted in the sleeve, and an annular heating element arranged in the chamber around the fan.

6. An air heater comprising a pair of parallel frame plates arranged to form a flat cylindrical chamber, a sleeve carried by one of the frame plates and extending outwardly therefrom, vided with an air inlet opening, a fan in the chamber, a motor carrying the fan and mounted in the sleeve, and an annular heating element arranged in the chamber around the fan.

7. An air heater comprising a pair of parallel frame plates arranged to form a fiat cylindrical chamber, a sleeve carried by one of the frame plates and extending outwardly therefrom, the other frame plate being provided with an air inlet opening, a fan in the chamber, means mounted in the sleeve and carrying the fan, a motor carried by said means, and an annular heating element arranged in the chamber around the fan.

8. An air heater comprising a pair of parallel frame plates arranged to form a flat cylindrical chamber, a sleeve carried by one of the frame plates, one of the frame platm having an air inlet opening, a fan having blades extending obliquely across the chamber, a motor mounted in the sleeve and carrying the fan, and an annular heating element arranged in the chamber around the fan blades.

In testimony whereof I have hereunto set my hand.

. MATT PAYNE.

the other frame plate being pro- 

